package com.example.ssm_demo1.entity.ViewObject;import com.example.ssm_demo1.entity.Articleinfo;import lombok.Data;import java.io.Serializable;@Datapublic class ArticleinfoVo extends Articleinfo implements Serializable {    private final long serializabled = 1L;    private String username;    @Override    public String toString() {        return "ArticleinfoVo{" +                "username='" + username + '\'' +                "} " + super.toString();    }}